Coach Randy Carlyle said Thursday that the 19-year-old defenseman won't be returned to the Moose Jaw Warriors of the Western Hockey League after he plays his ninth game with the Leafs.
A junior-eligible player is allowed to play up to nine games without his NHL team burning a year of his entry-level contract. Rielly will play his ninth game Friday in Columbus.
Rielly has four assists, a minus-3 rating and two penalty minutes in eight games this season.
He was drafted fifth overall by Toronto in 2012.